Surprisingly, the calendar, through the invention of the work week, has hidden dangers. More traffic accidents happen on weekends, a trend that's persisted for three decades or more, as shown in the following graph.

The technological complexity of automobiles is rapidly increasing through the incorporation of more electronics and more control software. Now that hackers have conquered your home computer, they're going after your car. Two securityresearchers have illustrated that such a thing can happen by demonstrating a remote takeover of a Jeep Cherokee.[10-12] They accomplished their attack by injecting code into a digital audio broadcast received by the vehicle's radio system.[10] The attack, which allowed killing the engine and remotely activating or disabling the brakes, affects 1.4 million US vehicles. [11] A YouTube video has been posted of the demonstration.[12]

According to the recently published book, Future Crimes by Marc Goodman (Doubleday, February 24, 2015), after the hackers get your car, they'll go after your house and everything in it.[13] The enabling technology behind this new danger is the "Internet of Things" (IoT) future in which nearly everything will be connected to the Internet. I wrote about the IoT in a previous article (The Internet of Things, October 11, 2013).

Just as hackers and other nefarious organizations have been able to take control of desktop computers and industrial control systems, they can control nearly everything connected to the Internet. The problem is that even carefully designed software often contains flaws that are easily exploited to grant a hacker complete system control. Things become especially worrisome when the software controls an implantedmedical device with wireless Internet connectivity designed for health monitoring and control of the device parameters.